Method for producing semicarbazones

US7795465B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Thomas Zierke · Böhl-Iggelheim, DE
• Stefan Engel · Idstein, DE
• Peter Otto · Gronau, DE

Key dates

• Filing date: Mar 16, 2005
• Grant date: Sep 14, 2010
• Expiry date: Jan 21, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C281/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing semicarbazone compounds of the formula I, where R1 and R2 are each independently hydrogen, halogen, CN, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-haloalkyl or C1-C4-haloalkoxy, and R3 is C1-C4-alkoxy, C1-C4-haloalkyl or C1-C4-haloalkoxy, by reacting a hydrazone compound of the general formula II, where R is C1-C4-alkoxy, amino, C1-C4-alkylamino or di(C1-C4-alkyl)amino, and R1, R2 are each as defined above, with an aniline compound of the general formula III where R3 is as defined above.